Type-writing machine



2 Sheets-Sheet 1.

G. W.- N. YosT.

TYPE WRITING MACHINE.

No. 343,655. Patented June 15', 1886.

WTJV'ESSES.-

.Attorney G. W. N. YOST.

TYPE WRITING MACHINE.

No. 343,655. Patented June 15, 1886.

UNITED STATES PATENT Ormea.

GEORGE w. N. Yosr, OE NEW YORK,

N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE AMERICAN WRITING MACHINE COMPANY, OF NEWY YORK,

4TYPE-WRITING MACHINE.'

PI-CIFECATION forming part of Letters Patent No. 343,655, dated June l5, 1836.

Application tiled August 12, 1879.

To all whom it may concern:

Be it known that I, GEORGE W. N. YosT, of the city, county, and State of New York, have invented a new and useful Improvement in Type-VVriting Machines, of which the following is aspecitication.

The invention relates to that class of typewriting machines in which the successive depression and release of a series of keys one after another vibrate and throw a series of types against an inking substance and the substance to be written on, and after each depression and release of any key, and whilev the type and key are going back to place move the latter substancea typespace distance, and thus make impressions or write one letter or character at a time, and in which there is a platen for holding the paper to be printed on attached to a paper carriage, said platen Aand carriage moving horizontally over the types.

In the accompanying drawings, in whichy similar letters ofreference indicate like parts, Figure l is a front sectional elevation of a type-writing machine, showing a section of f the key-levers, elevations of several connecting-rods and type-bars, the paper-carriage platen, dto. Fig. 2 is ahorizontal plan of the top-plate with the rear guide-rail, paper-carriage, and all its appurtenances removed, showing an arrangement of type bars and hangers in two rows concave to one another. Fig. 3 is a partial end view of the machine, showing an elevation of the cam-spring wheel, and mechanism imparting motion to the inl;- ing-ribbon spool. Fig. 4 is a plan of the camspring Wheel which moves the papercarriage and mechanism for imparting motion to the inking-ribbon spool. Fig. 5 is a front view of the cam-spring wheel and the pawls and ratchet-wheels on the inkingribbon-spool axle.

This invention consists, first, in a novel arrangement of adjustable type-bar hangers in two curved rows, in combination with typebars which vibrate upon or about axles in said hangers and strike at a common impressingpoint. This arrangement is shown in the drawings at Fig. 2, in which A represents the top plate of a type-Writing machine; B, a series of adjustable type-bar hangers held upon the top plate, A, by screws and continuous washers K K; F, a series of type-bars, each having a type in its end G, which type-bars vibrate on pivoted journals in bearings in the hangers B, the longer arms/of which are of varied lengths, so that cach may impress its respective type at the common impressingpoint P. Between the two rows of hangers, but in nearly the same plane with them, is an inkingribbon, R, and the ribbon-guides Q Q. In Fig. l the saine parts are shown in elevation, together with the key-levers L and connecting-rods l. In the progress of the writing, the ribbon is unwound from the deliveringspool S on shaft D', and passing` over the guides Q Q is wound upon the windingspool S on the shaft D by mechanism, to be hereinafter described.

Iam aware that type-bar hangers have been heretofore arranged in a circle and in an oval or ellipse, in which case the ribbon-guides Q Q have to be outsideof the circular or elliptical row, and consequently quite far apart. The ribbon also rests on and rubs over several of the hangers, coating the hangers and `journals withyink, in which the dust sticks, so as to ultimately impede the free movement of several type bars. The present arrangement prevents any contact of the ribbon with the hangers or their journals, and allows the ribbonguides Q Q to be broughtnear together and 8O well in to the center of the machine.

In the drawings, R is the inking-ribbon, wound on the deliveringspool S', from whence it passes over the guides Q Q to the windingspool S. The spools are attached to shafts 85 D D by keys, which allow them to slip longitudinally on the shafts for a short distance, so that the whole surface of the ribbon may be used. The shaft Dl is supported in bearings in the flame of the machine, and terminates at its front end in a crank and handle D3. The other shaft,-D, is supported at its front end in a bearing in the pillar, and at its back end in a bearing running longitudinally in the stud Z, upon which the spring cam wheel J is mounted.

J is the carriage-strap connecting the camwheel and paper-carriage.

V is a crank attached to a worin-gear which meshes into the pinion V2, by which the tenroo sion ot' the spring inside the cam-wl1eel is regu lated.

J2 is an enlargement on the hub ofthe camwheel J, to which is fastened the pawl O by the screw O.

J and J4 are two ratchet-wheels moving together, and fastened rigidly to the shaft D by a setscrew in thehnb between them. By the spring 0 the pawl O is kept engaged with the teeth of the ratchet-wheel J.

Upon a hanger, U3, attached to the top plate of the machine, turns the pawl U about the screw U2, and it is held in contact with the teeth of the ratchet-wheel J' by the spring U.

Near the front end of the shaft D are two grooves or shoulders, d d', turned into the body of the shaft, into which tits a latch, D", hinged to the frame bythe screw D". \Vhen the latch is out of the grooves d d', thc shaft D may be moved endwise. Vv'hen the latch is in the groove d', as is shown in Fig. 4, the ratchetwheels J J' are in contact with the pawls O and U, and the shaft D and spool S can only be turned in the same direction as the camwheel, asindicated by the arrow, Fig. 5. NVhen thelatch is in the grooved. as is shown in Fig. 3, the pawls O and U are not engaged with the ratchet-wheels J and J, and the shaft D and spool S may be turned in either direction.

rlhe operation ot' this mechanism is as follows: Starting with the greater part of the ribbon upon the delivering-spool S', the latch D" being in the groove d', so that the pawls O and Uareacting upon the ratchet-wheels .Pand J, let a succession of keys be struck. After each blow the carriage will be released and drawn a letter-space by the springcam J. The cam will turn in the direction of the arrow,Fig. 5, and carry with it the pawl O, whereby the ratchet-wheels J and J4, the shalt D and winding-spool S, will be turned and a portion of the ribbon R wound upon the spool S and unwound from S. rlhe pawl U during this movement slips over the teeth of the ratchet-wheel J. When a line has been printed, or when, for any other reason, the papercarriage is moved back and the motion of the cam-wheel J is reversed, the pawl O slips over the teeth or' the ratchetwhcel J, and the pawl U, acting upon the ratchet-wheel J, holds the ribbonspool Sstationary. rlhis movement is continued until nearly all the ribbon has been wound upon thespool S. .The operator then raises the latch D", draws the shaftD forward by the knob D2, and lets the latch fall into the groove d. He then turns the shaft D by means ofthe crank D3, and rewinds the ribbon upon the spool S. The shaft D being put into gear with the pawls, the machine is again ready for work. rlhe deliveringspool S is of larger diameter than the windingspool S.

This combination of devices avoids the use of bevel-gears, and secures a direct connection between the eam-whcel and the ribbonspool, thereby reducing toa minimum the duty imposed upon the camspring. The inconvenience ot' reversing the ribbon byhand is more than counterlmlanced by the ease ot' movement ofthe whole mechanism due to the absence of gears.

`Whatl claim is- 1. In a typewriting machine, adjustable type-bar hangers arrangi din two curved rows, as shown and described, in combination with type-bars ot` uneqnallength pivoted and set so as to vibrate and strike at a common impressioirpoint.

2. In a type writing machine, the combination of the type-bar hangers and type-bars arranged in two rows curved onlyin the middle ot' their length, as shown and described, with an inking-ribbon situated between said rows.

3. In a typewriting machine,the combination of ribbon-spools, ot' which one is a winding-spoo1 located upon and rotating with thel shaft of 4the main spring-wheel which moves the papercarriagaand the other a deliveringspool i'recly rotating upon its shaft or axle, substantially as and for the purpose described.

GEORGE W. N. YOST.

Witnesses:

Moliets B. BAER. ELMER P. Howe. 

